Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b018070ecd71f3…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 21:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 509174697fd9f086fd25f664c83bb104 SHA-1: 9cf06061b9439cf22a0bd321bed226a142a890c4 SHA-256: 74b018070ecd71f35fff4eef8ef53002476e47775a0440419381e1a2a07b17b7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/123?utm_term=self+contained+air+breathing+apparatus+pdf PDF link annotation
    • http://maxist.ru/battle_dress_uniform_bduy0dn2.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/how_to_be_successful_in_time_management.pdfIn PDF document text
    • http://3bki.ru/zewiwimodifejamujiburio87c0.pdfIn PDF document text
    • http://grafoanaliz.ru/topobilisanetomuwazigun5nhzn.pdfIn PDF document text
    • http://maslovauto.ru/bikobokm0ck9.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/fjcOpVW/ball_games_online_unblocked.pdfIn PDF document text
    • http://bluebadge-support.com/rutagemumorenofivuxurs4b5i.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/gcja2ie/tepago.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/complete_metric_space_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/G2gccgO/hockey_tactic_board.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pikubub.onlinewebshop.net/69370423146.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_7e276838be1949f28dc614f5745bba9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b5592f-cc99-4f5a-9dcc-addde3f0a3a2/accu_chek_performa_error_codes_e4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76e0ac7-a88d-4642-98b5-bf240cb57d4a/fitbit_versa_lite_clock_face_always_on.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_56381c12ea8744dc9d796b4320e8cce1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1d33ba-bb1c-47cb-9e4b-86485f4347fe/kafetipilup.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_3c8a7697958a433d954503d2de1ec376.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2cb5b6-c7dd-42b9-8066-1403c33cb2d4/jezameruwokagowuzugelavib.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_7dd808b8f3be43ef80ecabd4b4f79e52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/715305d9-f511-4bee-b48d-414f68902c7c/15848459376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef7393-aa09-40e8-a9dd-56011f33d00f/51008551283.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 5544 bytes
SHA-256: b9302fce57a77084662fb2726c05013055372545b33bb828dc88c117ae503dc7
font_01_sfnt_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 11380 bytes
SHA-256: f9e7bf130e96317e1dda2dd81ce5a66954db1538061a14bca3eb9ecf0b058975
font_02_sfnt_off00012867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12867 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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